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While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

Gemini Sparkle

Key Takeaways:

  • Model Output Statistics (MOS) and the Localized Aviation MOS Program (LAMP) provide detailed, airport-specific weather forecasts, similar to TAFs, for approximately 1700 locations, including many without official TAFs.
  • These programs refine broad weather model data by incorporating local observations and geo-climatic factors, with LAMP offering hourly updates to enhance forecast granularity.
  • MOS and LAMP are valuable tools for pilots to validate official forecasts, improve overall weather situation awareness, and effectively apply personal minimums, especially at less-serviced airports.
  • While highly useful, MOS/LAMP are not substitutes for official TAFs or Graphical Area Forecasts for legal flight planning and can exhibit biases or reduced accuracy during highly irregular weather conditions.
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Those extra 30 ponies up front on the mighty Cessna 172SP tend to cause nosewheel landings—at least they do for me—and it was time to go out and knock the rust off my landings to keep the nosewheel safe. I awoke to a sunny morning after showers the previous evening and clicked through the weather while sipping my morning coffee. METAR green, nearest TAFs green, I was ready to go.

While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

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